function fb(n) {
    if (n === 1 || n === 2) {
        return 1
    }
    return fb(n - 1) + fb(n - 2)
}

console.time('fb执行时间1')
var result = fb(45)
console.timeEnd('fb执行时间1')

console.log('self:', self)
self.postMessage("worker1")